Yoghurt, I like big bags too. It all depends what you plan to carry with the GM. I do not carry much, so I decided on the PM. Mine fits a pochette size wallet, medium size makeup pouch, cell phone, key, A4 size documents and or a magazine, scarf, and an umbrella. With all of this inside, it is plenty heavy for me already. And if you need to carry more than I do, I suggest the GM size. GM also can make a great carry-on for travelling when you need extra room. Good luck with your decision!
I also noticed that you have the same item in your wish list as mine: Roxbury drive. I love this bag too!
I also noticed that you have the same item in your wish list as mine: Roxbury drive. I love this bag too!